Running The Vehicle While Parked - Hummer H2 2009 Owner's Manual

Running the Vehicle While Parked

It is better not to park with the engine running. But if you
ever have to, here are some things to know.
CAUTION:
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Idling a vehicle in an enclosed area with poor
ventilation is dangerous. Engine exhaust may
enter the vehicle. Engine exhaust contains Carbon
Monoxide (CO) which cannot be seen or smelled.
It can cause unconsciousness and even death.
Never run the engine in an enclosed area that
has no fresh air ventilation. For more information,
see Engine Exhaust on page 2-45.
CAUTION:
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It can be dangerous to get out of the vehicle
if the automatic transmission shift lever is not
fully in P (Park) with the parking brake firmly set.
2-46
CAUTION: (Continued)
CAUTION: (Continued)
The vehicle can roll. Do not leave the vehicle
when the engine is running unless you have to.
If you have left the engine running, the vehicle can
move suddenly. You or others could be injured.
To be sure the vehicle will not move, even when
you are on fairly level ground, always set the
parking brake and move the shift lever to P (Park).
CAUTION:
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Full-time four-wheel drive vehicles with the transfer
case in (N) Neutral will allow the vehicle to roll,
even if the automatic transmission shift lever is in
P (Park). So, be sure the transfer case is in a
drive gear — not in (N) Neutral. Always set the
parking brake.
Follow the proper steps to be sure the vehicle will not
move. See Shifting Into Park on page 2-43.
If pulling a trailer, see Towing a Trailer on page 4-55.